I'm guessing I don't need near that size perhaps 9-10 KVA? John
On 5/30/2012 12:20 PM, Dave wrote: > On 5/30/2012 12:34 PM, andy pugh wrote: >> On 30 May 2012 17:15, Dave<[email protected]> wrote: >> >> >>> Perhaps I missed something; Did you figure out if that transformer in your >>> machine is a Delta-Wye transformer or not? >>> >> It seems to be an autotransformer with a common centre tap (pretty >> much identical to the hypothetical one I described). >> There is low resistance between every combination of terminals, >> including both input and output to neutral. >> >> That, plus the advice from Siemens, does seem to hint that swapping >> the existing step-up transformer for one with a neutral tap in the >> secondary is the way to go, though. >> >> > Ugh... I missed the "autotransformer" conclusion. I thought this was > some type of autotransformer/transformer combo. So the machine builder > saved $100 by using an autotransformer.. Geez. > > Yep, I would find a Delta-Wye transformer and ground the Wye center. > > With the high price of copper these days, transformers are going for > premium prices. > > This guy really has his prices set high ... perhaps he would entertain > an offer? I don't think these will sell for the asking price. > http://www.ebay.com/itm/Marelco-30KVA-60Hz-3phase-Transformer-230-240-460-480-Volt-Delta-380-400-Y-Wye-/180816467318?pt=BI_Circuit_Breakers_Transformers&hash=item2a19805576 > > You might want to try Uship.com if you want to get one of these > transported. I have had good luck with that service. Just be picky > about who you select. > > Dave > > > > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
